SCIENCE fiction fans dream of the day when humans will be able to travel in time. But will it ever become a reality? Will we ever be able to go forward in time? Some believe that time travel is already possible. In fact, Dr Alastair Wilson of the University of Birmingham says that we already do so every day. "Just by walking around we accelerate relative to our environment, which dilates time and causes us to effectively travel slightly faster than usual into the future," he explains. Dr Wilson is referring to Albert Einstein's theory of special relativity, which states that as an object moves more quickly, time will appear to slow down. However, for an object to truly travel forward in time, the object would need to move at a pace approaching the speed of light – or 186,000 miles per second – an impossibility according to the laws of physics. Another method of time travel that has been proposed is via a wormhole – a shortcut linking two different times and places. Einstein theorised